Heater



FIG. 1 is a front elevational view of a heater embodying my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view thereof with the lower control drawerin open position;

FIG. 8 is a top plan view thereof;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a bottom plan view thereof; and

FIG. 12 is an enlarged front perspective view thereof with the frontlouvers in open position and the heater tilted backwards on its base.

The ornamental design for a heater, as shown.